check up on somebody

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

check up on sb phrasal verb [ checks up on sb checking up on sb checked up on sb checked up on sb checked up on sb ]
to try to discover what someone is doing in order to be certain that they are doing what they should be doing
• My mum checks up on me most evenings to see that I've done my homework.
Thesaurus⁺: ↑Testing, checking and experimenting
Main entry: check_{phrasal verb}